English definition of “pool”
SWIM [C] (also swimming pool) › an area of water that has been made for people to swim in: The hotel has two outdoor pools.
LIQUID [C] › a small area of water or a small amount of liquid on a surface: We dipped our feet in a shallow pool by the rocks. apool of blood
GAME [U] › a game in which two people use long, thin sticks to hit coloured balls into holes around the edge of a table
COLLECTION [C] › a collection of money, people, or equipment which is shared by a group of people: a car pool for company business